When printing a jpg file "noise" in the form of gray pixes appear around the text and graphics. The file looks fine in any number of viewers including
MS Paint
PictureViewer
Windows Picture and Fax Viewer
Flock browser
and my favorite
Irfanview

You can see the original image here

The pdf produced from Irfanview here
which looks OK but shows some noise

and then the one produced by Flock here
which is horrible.

What's going on?